DIY F2 clone - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th November 2006, 06:47 AM   #1
diyAudio Member
 
Join Date: Nov 2006
Default DIY F2 clone

I am new to this forum, so apologies if the answer to this question has been worn out, but I am interested in building an F2 clone. Dick Olsher is mandating use of the F2 to power the Eminence woofer in his Basszilla speaker and I can't afford the store-bought version.

Has the Reverend Pass released the necessary circuit information to now make a DIY clone possible? If so, where does one find it? If not, is there some timetable?
  Reply With Quote
Old 28th November 2006, 08:50 AM   #2
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
Default first watt f1 f2

Quote:
First Watt is a "kitchen-table" effort by Nelson Pass. First Watt builds very simple high quality, low power audio amplifiers intended for use with sensitive loudspeaker drivers.

These amplifiers are hand-built by Pass and are available in very limited quantities. Each design is a different exploration into high quality at low power.
At the end of the sales cycle of new product, the schematics and technical details of each design will be posted for the benefit of the "DIY" community.
As you can see from this quote of FAQ at http://www.firstwatt.com/faq.htm
the promise we can trust in is:
... there will be, in time technical details of each design
... but not until The End of sales cycle of new product.

As what I can understand, Nelson may correct me, this means details are public for F1 now.
As F2 is now a new product, for sale. Like is F3.
And we have to wait patiently some time for more detailed info of F2 and F3.

Or sign up for to be a lucky buyer of an exemplar of F2!


What we can download now, by the generosity of Mr. Pass is at this download page:
http://www.firstwatt.com/downloads.htm

Quote:
Manuals:
F1 Owner's Manual
F2 Owner's Manual
F3 Owner's Manual
Aleph J Owner's Manual

F1 Service Manual

F1 Review by Jon Ver Halen of Lowther American.

Articles:
Current Source Crossover Filters
Current Source Amplifiers and Sensitive / Full-Range Drivers
.
For details of an amplifier we look for Service Manual
as for service there would mostly be a schematic needed.


regards
lineup
__________________
lineup
  Reply With Quote
Old 28th November 2006, 10:10 AM   #3
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Hi Scott, welcome to the Pass forum Yep we backengineered the F2. Mr. Pass said it was pretty close to the factory amp.
The development is mainly in this thread:
zen without feedback
And this thread contains loads of good information and some examples of finished amps.
F2 Initial Listening Impressions
Apassgear and I worked together on a boardlayout that is confirmed functional.
Good luck and happy building

Steen
  Reply With Quote
Old 28th November 2006, 09:27 PM   #4
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Tomorrow

  Reply With Quote
Old 28th November 2006, 09:32 PM   #5
steenoe is offline steenoe  Denmark
diyAudio Member
 
steenoe's Avatar
 
Join Date: Mar 2004
Quote:
Tomorrow
Wow, that sounds great. Man, have I been waiting for this

Steen
  Reply With Quote
Old 29th November 2006, 06:41 PM   #6
diyAudio Member
 
Join Date: Nov 2006
Default F2 Clone Delight

Delighted to learn that some folks have already been developing F2 clones. And the "tomorrow" announcement from Mr. Pass about official circuit availability, while suitably cryptic to afford him the necessary wiggle room (been there, done that), is gratifying.

Seeing as what little skill I have is in speaker building and wiring up tube amps, I'm going to need all the help I can get to assemble an F2 clone. The operative word here is "assemble," as there's no way in hell I could actually build one from a schematic. So for those who are planning to whip together clone F2 circuit boards, power supplies, heat sinks et al, I hope you can be persuaded (with suitable incentives) to make extras enabling the electronics impaired to assemble something that won't turn into molten aluminum when switched on.

Here's hoping tomorrow arrives soon...
  Reply With Quote
Old 29th November 2006, 07:23 PM   #7
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Here we go

Attached Files
File Type: pdf f2r1 sch.pdf (85.1 KB, 5375 views)
  Reply With Quote
Old 29th November 2006, 07:43 PM   #8
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
Now, this is nice.
We get it faster than the official Firstwatt site.

Is there a particular reason to do the series/parallel resistor bank instead of one or two resistors?

/Hugo
  Reply With Quote
Old 29th November 2006, 07:48 PM   #9
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
I use 3 watt resistors, and the lowest value I have in stock
are .33 (now used up) and the .47 ohm from Panasonic, which
is their lowest value. So parallel/series resistors are examples
where I want a lower value than .47 or more dissipation than
a watt or so.
  Reply With Quote
Old 29th November 2006, 07:56 PM   #10
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
 
Netlist's Avatar
 
Join Date: Jan 2003
Thanks,
I think I'll try this exercise in simplicity one day on my Fonkens. (FE127E)

/Hugo
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
F1 Clone DIY PCB suds Group Buys 2 8th January 2009 09:50 AM
My F3 Clone 04dgmsilv Pass Labs 11 31st August 2008 11:59 AM
clone AN/K ccopp Multi-Way 0 9th July 2006 08:24 AM
Question regarding ProAc 2.5 Clone and Tempo 2 Clone zoooh Multi-Way 5 11th March 2003 08:19 PM


New To Site? Need Help?

All times are GMT. The time now is 11:17 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2